Mama’s favorite nerdy dramas return from their summer breaks, which were more than likely spent in library basements.

“Chuck” (Monday, 8 p.m., NBC) If you didn’t know this geeky-super-spy caper was the ultimate ’80s tribute, you probably haven’t read this column, like, ever. And the fourth season opener is no exception as Rocky’s Soviet nemesis Dolph Lundgren will be just one stop along Chuck’s crime-fighting world tour.

“Castle” (Monday, 10 p.m., ABC) After a summer apart – Castle headed to the Hamptons with his ex – can the ruggedly handsome mystery writer and tough but tender detective reconnect? Won’t be much a show if they don’t.

“Bones” (Thursday, 8 p.m., Fox) Mama suspects that the Forensics Anthropology Unit’s solo careers won’t last long, which is where we ended last season, as Cam tries to solve the case of an unidentified young boy.

“Fringe” (Thursday, 9 p.m., Fox) Are you one of those “X-Files” fans who has spent years looking for a show to fill the void left by the exit of Agents Mulder and Scully? For those of you who haven’t visited “Fringe’s” alternate-universe yet, go out and rent the first two seasons on DVD before watching the season premiere. There is just as much complicated lore to learn as in “The X-Files,” but it’s also as intriguing. If you have been lucky enough to get into this sci-fi adventure early, then you know that Olivia is trapped in the alterna-world, as Peter and Walter unknowingly work with her doppelganger.

“Smallville” (Friday, 8 p.m., The CW) This once-sweet series turned waaay too comic booky a long time ago, but it may be worth tuning in for the final season. Yes, there’s some catching up to do – Clark Kent is the one with receding hairline, for instance – but we can expect a lot of familiar faces to resurface, beginning this week with the return of Mama’s favorite Papa, John Schneider.

“Supernatural” (Friday, 9 p.m., The CW) Sam’s dead, and Dean is living a quiet suburban life after retiring from demon hunting – what kind of 401k plan does that involve? This darkest, scariest series in The CW linesup is also its best offering, and if TV’s cutest pair of brothers can’t entice you to watch, perhaps Mitch Pileggi’s return as Dean and Sean’s grandpa will convince you it’s worth a look.

“Sharktopus” (Saturday, 9 p.m., Syfy) Part shark. Part octopus. Theme music by The Cheetah Whores. It’s like Syfy wraps up these movies in little packages and leaves them on Mama’s stoop as gifts from the bad movie gods.